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Mr. Dubey • 100.69K Points
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Q. Which one of the following processes involve chemical reactions?

  • (A) Storing of oxygen gas under pressure in a gas cylinder
  • (B) Liquefaction of air
  • (C) Keeping petrol in a China dish in the open
  • (D) Heating copper wire in presence of air at high temperature
Correct Answer - Option (D)
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